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Патент USA US2412094

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Dec. 3, 1946.
2,412,094
J. .1. MOYNIHAN
SIGNAL DEVICE
1
Filed April 1, 1942
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E56.
INVENTOR
JOHN J. MOYNIHAN
BY
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M, 4WD &
ATTORNEYS
2,412,094
Patented Dec. 3, 1946
UNITED STATES PATENT .IOFFI'CE
‘2,412,094
_
smmir. DEVICE
John J. Moynihan, Rochester, N. Y., assignor of
one-half to Joseph B. Brennan, Cleveland,
Ohio
Application April 1, 1942, Serial No. 437,252
7 Claims. (Cl. 177-351)
' i
This invention relates, as indicated, to signal
devices, and more particularly to a method of and
apparatus for the transmission, to a remote point,
certain signals and signal information so that
the transmitted data may be in conveniently ob
2
usually quite fragile and is therefore entirely un- _
suited for most purposes for which equipment
of this character is required.
It is a principal object of my invention to pro
vide a method of and apparatus'for producing ef
fectively similar results with apparatus of a much
servable and intelligible form.
,
'
less expensive and much more rugged nature.
This invention relates particularly to methods
Other objects of my invention will appear as
of and apparatus of the character described in
the
description proceeds.
which the remote station to which the informa
To the accomplishment of the foregoing and
tion is to be transmitted is most conveniently 10 related ends, said invention, then, consists of the
coupled to the station of original information by
means hereinafter fully described and particu
means of a radio link.
'
larly pointed out in the claims, the annexed '
My invention is particularly applicable for the
drawing and the following description setting
purpose of transmitting to a remote station an
forth
in detail certain means and one mode of
indication of the present state of one or more 15 carrying out the invention, such disclosed means
meters such as are usually provided with a cursor,
and mode illustrating, however, but one of various
the relative position of which is indicative of the
ways in which the principle of the invention'may
information to be derived from the particular in
be used.
‘
‘
strument or meter. From the description which
In said annexed drawing:
,
ensues it will be readily apparent that my inven 20
Fig. 1 is a transverse sectional view of a cath-'
tion is capable of a wide variety of application
ode ray tube constructed in accordance with the
such as, for example, when it is desired to deter
principles of my invention and forming an ele
mine at a remote point the present state of one
ment of the apparatus of my invention;
or more instruments, gauges, or similar indicating
Fig. 2 is a sectional view of a portion of the
devices. In one speci?c embodiment of my inven 25 structure illustrated in Fig. 1 drawn to an en
tion the same may be utilized for the purpose of
larged scale for clarity'of'illustration;
determining at a remote point the present or in
Fig. 3 is a transverse sectional view of the struc
stant condition of a plurality of pressure gauges,
ture illustrated in Fig. 1 taken on a plane sub
temperature indicating devices, and the like, such
as, for example, are providedwith cursors, the 30 stantially indicated by the line 3—_3;
Fig. 4 is a schematic diagram illustrative of a
position of which is indicative of the variable
portion of the apparatus of my invention;
Fig. 5 is a part sectional, part perspective view
condition continuously re?ected by the speci?c
instrument or gauge.
Another field of utility of my invention is in de
termining at a remote station such as may be con
of an alternative form of construction of a part
'
Fig. 6 is a diagrammatic representation of an
alternative form of construction of a portion of
my apparatus such as that illustrated in Fig. 1.
35 of the apparatus illustrated in Fig. 1; and
veniently located on the ground, the condition of
a plurality of instruments such as occur on the
instrument panel of an airplane in ?ight. By the
Broadly stated my invention comprises the pro
use of my invention an operator at a ground sta
tion may have before him a substantial duplicate 40 vision of means for generating a scanning elec
tron beam, a target arranged to be traversed or
or replica of the faces of the instruments, or at
least certain of them, on the instrument panel
of an airplane in flight with the cursors of the
instruments thus located at the ground station at
all times coinciding with their counterparts in the
actual instruments on the plane itself.
Heretofore it has been proposed to accomplish
this result by utilizing television equipment for
this purpose, and particularly by the employ
ment of an ordinary image pick-up tube focused 50
on the instrument panel of the signal generating '
swept by said beam in its scansion, and means
coordinated with the signal or data to be trans
mitted for producing. a movable electron beam
shadow on the target; deriving a signal which
is a function of the impingement of the beam
upon the target; and then transmitting such sig
nal for reconstruction as a visual image at a re
mote point whereby a facsimile or reproduction
of the electron beam shadow on the target afore
said will be reproduced.
-
In the foregoing broad statement of my inven
tion, I have used certain terms, such as “scan
equipment and a viewing tube at the remote sta
tion on which the image of the pick-up tube is
ning electron beam”; “target”; and “movable
reconstructed. The optical and electrical appa
ratus associated with such system is of course 55 electron beam shadow.” It may be well, before
2,412,094
3
proceeding with the description of my invention
wherein these terms will be used repeatedly, to
indicate the interpretation which I intend to be
given to such terms whenever used in this descrip
- tion or in the appended claims.
By the term “a scanning electron beam," I in
tend to generically include any electron beam or ,
the like which is caused to traverse in any way
the target toward which it is directed. Where in
4
the special target which characterizes one fea
ture of my invention.
As previously indicated, the present invention
is concerned with the problem of transmitting
to a remote station data indicative of the position,
for example, of a cursor associated with a con
ventional instrument such as a pressure gauge,
air speed indicator, altimeter, or the like. In
Fig. 3, the base 4 of the tube envelope 3 is shown
this description reference is made to the fact that 10 in dotted lines. In full lines is shown an instru
ment panel on the face of which are mounted
the beam scans the target, it is, therefore, meant
the dials and movable cursors of the instruments
that the beam sweeps over the target in whatever
associated with the respective dials. Throughout
direction or path may be desired for a particular
.the following description of my invention, it will
installation. Thus the beam, in sweeping over
the target, may sweep thereover only once or a 16 be assumed that the apparatus illustrated, for
example, is designed to transmit to a remote sta
- plurality of times; and the line of intersection
tion an indication of the relative positions of
between the beam‘ and the plane of the target
the
several cursors with respect to their respective
may be a straight line, a circle, or any modi?ca
dials.
tions of the same, it being within the contempla
The instrument panel generally indicated at 5
tion of my invention to use any of these ex 20
has the several instruments 6 mounted thereon
pedients.
. with the shafts ‘I carrying the cursors extended
Where the word “target” is used in this de
so that when the panel 5 and envelope 3 are
scription is meant the provision of any member
mounted in assembled relation by clamps such
whether conductive or non-conductive, but which
is so positioned with respect to the electron beam 25 as 8, the cursors 9 will lie closely adjacent to the
outer surface or face of the base 4 of the envelope.
that the latter impinges thereon during atleast
Rigidly supported 'in the base of the envelope,
a portion of the period of oscillation of the beam.
and preferably parallel to the base face 4, are
Throughout the following description and in
spaced plates l0 and II. These plates will be
‘the claims, I shall also frequently use the term
“movable electron beam shadow,” and by this 30 anchored to the envelope in any suitable manner
so as to be maintained rigid with respect thereto,
term I, intend to generically include all cases
and with respect to each other. The plate in is
where the placing of any beam intercepting
provided with bearings 12 which rotatablyisup
means in the path of the beam prevents the latter
port spindles 13. The spindles l3 have ?xed
from impinging upon the target during any por
tion of the path of travel of the beam. Thus, 35 thereto, at opposite ends, bars I4 and ii, the
latter being made to correspond for convenience
for example, if the beam is arranged to oscillate
in shape and general configuration to a conven
so as to closelyscan by following parallel lines
tlonal cursor such as might be employed in con
a rectangular area and a spherical object is
junction with the instrument 8.
placed in the path of the beam in front of the
One of the elements 9 or H or both are per
rectangular area or target, such object, in ac 40
manent bar magnets. The fact that the spindles
cordance with my invention, would cast a circu
I! are mounted for free rotation in the bearings
lar beam shadow on the target even though such
l2 will cause the bar H to, at all times, overlie
spherical intercepting means only intercepts the
the bar a in parallel relationship.
,
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beam periodically during the scansion of the lat
Suitable leads such as it and I1 are connected
45
ter over the target.
with the plates ill and II and carried through
By use of the term "movable” in modifying the
the envelope 3 in appropriate sealed connections.
de?nition of “electron beam shadow" as above
-In Fig. 4, I have illustrated diagrammatically
de?ned, it is intended to mean that the electron
the circuit previously explained. The electron
beam intercepting means is movable in such a
way that the total electron beam shadow cast 50 gun is‘ denoted by the reference character 2, and '
thereby is movable with respect to the target
is capable of producing scanning electron beam
upon which such electron beam shadow falls.
Stated in another way, the provision of means
for producing a movable electron beam shadow
on the target comprises means for selectively 65
and the latter is shown connected directly to ‘
adapted to sweep over or scan the target plate
I I. The bar I! is shown ?xed to the spindle l3
shielding diiferent portions of the target from
impingement by said beam.
the lead l8 instead of through the plate ill
through which such connection is made in the
actual construction illustrated in Figs. 1 and 2.
Referring now more speci?cally to the drawing,
and more especially to Fig. 1, the cathode ray
be used in a television circuit and a conventional
erally. indicated by the reference character I . In
_ Fig. 1, that portion of the cathode ray tube 1
the spindle 1 of the instrument 6 rotates, the
A conventional transformer l8, such as would
tube here illustrated as embodying one represen 60 television transmitter,
trated at l9.
tation of the principles of my invention is gen- v
is diagrammatically illus
From the foregoing, it will be observed that as
cursor l5 will be maintained in synchronism
therewith.
As the electron beam generated by
65
- erence character 2, is conventional, and forms no
embraced by the bracket associated with the ref
the gun I traverses or scans the target ii, the
cursor i5 will intercept the electron beam or
more accurately cast an electron beam shadow
means for varying in a prescribed manner the
on the target II, and the signal derived and
axis of the ray with respect to the axis of the
gun, so that such ray in its oscillation will sweep 70 transmitted to the remote station will, when. re
part of this invention. The part 2 of the tube
comprises the conventional cathode ray gun with
constructed in accordance with conventional tele
over or scan a target which may be positioned in
vision practice, show the relative position of the
the right-hand end of the tube.
cursor IS with respect to the target.
The envelope of the tube generally indicated
Fig. 5 shows a slight modi?cation of the ar
at 3 terminates in a substantially flat base 4 ad
rangement
illustrated in the previous figures, in
75
Jacent which is mounted in any suitable fashion
2,412,094
5
6
that the target I I a is provided with a plurality
oir indicia which may be either apertures or
and target, and an element between said beam
generating means and said target movable by
outside, control to form an image-shadow for
non-conductive areas so that the facsimile of
the target when reproduced at the receiving sta
tion will have such indicia thereon to facilitate Cl
interpetration of the position of the cursor with
respect to such indicia as represented by the
electron beam shadow oi’ the cursor on the
reproduction.
‘
3. In apparatus of the character described, the
combination of means for generating a scanning
electron beam, a target arranged to be swept by
said beam, a sealed envelope enclosing said means
target.
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and target, a cursor enclosed in said envelope
In Fig. 6 I have illustrated a signal generat 10 between the beam-generating means and the
ing cathode ray tube embodying a modification
target for forming a reproducing image by cast
of my invention as previously explained. In this
ing a moving beam shadow on said target, and
modification, a conventional cathode ray gun 2a
means including a magnetic element for moving
is employed. The base 4a of the envelope, or
said cursor.
more particularly the target lib, is curved so 15
4. In apparatus of the character described, the
that a small sphere 2a (of suitable material as
combination of means for generating a scanning
known in the electronic art), when permitted to
electron beam, a target arranged to be swept by
restthereon by gravity, and when the axis 01'
said beam, a sealed envelope enclosing. said
the envelope 3a is tipped back and forth, the
,means and target, movable cursor means en
sphere will roll back and forth on the target lib. 20 closed in said envelope between the beam
In this case, the sphere 20 functions as the
.generating means and the target for forming a
cursor or as the means for providing the movable
reproducing image b; casting a moving beam
electron beam shadow on the target, and the,
shadow on said target, and means deriving a
signal derived from the target and transmitted
signal from the target indicating the position
will, therefore, show on the reproduction thereof 25 of the cursor means.
at the remote station the relative position of the
5. In apparatus of the character described, the
sphere 28 with respect to the target. It will be
combination of means for generating a scanning
immediately-apparent that the device in F13‘. 6
electron beam, a target arranged to be sweptby
may be utilized as a turn and bank indicator, for
said beam, a sealed envelope enclosing said
aircraft.
,
The foregoing is obviously only one embodie
ment of the principles of my invention, the
illustrated embodiment being particularly suit
30 means and target, a cursor enclosed in said'en
velope between the beam-generating means and
the target for forming a reproducing image by.
casting a beam shadow-on said target, means
including a magnetic element for moving said
able for use in connection with remotely con
trolled aircraft where it is desired to indicate at 35 cursor, and means deriving a signal from the
the ground station the condition of the instru
target indicating the position of .‘the cursor
ments in the remotely controlled craft. It will
be apparent to those skilled in the art, however,
that the fundamental expedient characterizing
the present invention, namely the provision of
means for casting a movable electron beam
shadow on the target, may be utilized for a
variety oi’ purposes which it is believed unneces
sary to speci?cally refer to at this point.
Other modes of applying the principle of my
invention may be employed, change being made
as 1 regards the details described, provided the
features stated in any of the following claims or
the equivalent of such be employed.
1, therefore, particularly point out and dis
tinctly claim as my invention:
1. In apparatus of the character described, the
combination of means for generating an electron
beam, a target in the path of said beam, a sealed
envelope enclosing said means and target, and
movable cursor means between said beam-gen
erating means and said target to form a shadow
on the target for reproduction of such cursor
means image.
means.
_
6. In apparatus of the character described, the
combination of means for generating a scanning
electron beam, a target arranged to be swept
by said beam, a sealed envelope enclosing said
means and target, movable means enclosed by
said envelope for forming a reproducing image
of the ‘movable means by its casting a selectively
movable beam shadow on said target, and a
cursor outside of said envelope linked with said
movable means whereby the position of the latter
is synchronized with the position of said cursor.
7. In apparatus of the character described,
50 means for generating an electron beam,‘means
for sweeping said beam back and forth in scan
ning movement, a target to be scanned by said
beam, a sealed envelope enclosing said means
‘and target, an indicating gauge on the outside
of said envelope having a movable indicator ele
ment, a cursor on the inside of said envelope‘
between the means for sweeping said electron
‘beam and said target and being movable-in
unison with said gauge indicator element, and
2. In apparatus of the character described, the 60 means deriving a signal from said target having
combination 01' means for generating a scanning
electron beam, a target arranged to be swept by
said beam, is sealed envelope enclosing said means
a function indicative of the position of said ?rst
named
cursor.
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JOHN J. MOYNIHAN. '
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